The 94-room Beauport Hotel is Gloucester, Mass.'s first full-service hotel. This project moved forward thanks to community outreach efforts by its GC Windover Construction. Image: Peter Vanderwarker Photography

The retractable roof over Arthur Ashe stadium at the National Tennis Center in New York is a freestanding, 6,500-ton structure whose moveable panels can enclose the facility in seven minutes. Image: USTA/Michael LeBrecht II

CertainTeed's Apollo II solar shingles (pictured) are among the few survivors in a market that's seen its share of failed launches. Undautned, new entrants Solar City and the startup Sunflare are trying to make inroads with new solar roofing. Image: CertainTeed